Drying oven unit



July 22, 1930. J. D. ELDER 1,771,032

DRYING OVEN UNIT Filed Dec. 11, 1928 2 Sheets-Sheet 1 INVEN'TOR ATTORNEY July 22, 1930.

J. D. ELDER 1,771,032

DRYING OVEN UNIT Filed Dec. 11, 1928 2 Sheets-Shoot 2 mfaw INVENTOR ,flJ ATTORNEY.

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Patented July 22, 193i ooMrAnY, or i Yonir,

111i, vM.ARYLiillll), ASSIG'INQE TO CROKVN CORK & SEAL It. Y., A CORPGBATIQN OF NEW YORK DRYING OVEN UNIT Application filed Decemberll, 1928. Serial No. 325,253.

invention relates to drying oven units, and more particularly to a unit of a type wherein the oven has travellin racks therein, and has associated there *ith a printing or 3 other machine for applying a decoration in ink or coatingof other material to metallic or other sheets, and immediately delivering such sheets to said racks.

Drying ovens embodied in units of the type to which my invention relatescontain a large number of racks for supporting sheets edgewlse 1n fairly close, butnon-contactlng,

relation with each other, while said racks are travelling through the oven. The time interval between the feeding of sheets to said racks and their delivery from the oven is such as to ensure a sufficiently complete'drying or oxidation of material applied to a surface or surfaces of said sheets to permit the handling of the sheets, without likelihood of scratching or smutting the surface of the sheets llllllldlltel fOllOWlll thelr dei .7 e livery Irom the drying oven.

When an elevated temperature is em 2 plo ed in such ovens, it is'desirable, to avoid spoilage or wastage, that the racks in the oven tr vel substantially continuously, and that the even be operated for a sufiicient time following the shutting down of the associated 3oi printing or other machine, to complete the drying operation upon all work delivered to the oven carrier racks. i Vlnle an oven ord1- narily operated substantially continuously it is commonly necessary to stop the associe i atedprinting or other machine a number oftimes during a run thereof; 7.

lVhile, with the proper adyustment of mechanisms in the printing or other machine with relation to the actuating means for the carriers for the racks in'the oven,-the print- 111;; or other machineand the oven'carriers 1y operated with a proper to each other, this adjusty lost with the stopp or T the printing or other machine. P ior to my invention, the adjustment of such mechanisms preparatory to, or during, a run of the 'nting or other inach'ne establish a i oer timing); in the relative operation of these mechanisms, required consid-' scratching or smutting of the fresh coating material thereon.

To avoid delays in the operation of the printing or other machine, due to the adjustment of the actuating mechanism therefor in relation to the actuating mechanism for the carrier of an associated oven, and possible inaccuracies in the making of such adjustment, and permit a continuing opera tion of the oven, notwithstanding the stop page of the printing or other machine, I provide an actuating mechanism for imparting travel to the oven racks to which power is transmitted from the actuating mechanism for the printing or other machine, which mechanism not only brings a rack into position to receive a decorated sheet from the delivery mechanism of the printing or other machine at a certain point of each cycle of operations of said printing or other machine, but, following the operation of the oven after machine, automatically controls the applica ticn of power to the oven carrier by the actuating mechanism for theprinting or other machine until the relation of parts in such machine and the oven racks is such that when it without danger of collision therewith or with a preceding rack.

The utilization of a single source of power for driving both the printing or other ma-I chine and the oven racks, and the employment of a power transmission mechanism having the above characteristics, not only results in that automatic adjustment of the two mechanisms in relation to each other above referredto, out at all times when both mechanisms are functioning, synchronizes the operation of'fthe actuating mechanisms. of the printing or other machine and of the raclr carriers so as to avoid the development or accumuulation of error even during a the stoppage of the printing or the protracted run of the unit, since any variation in the speed of the actuating mechanism for the printing or other machine will be accompanied by similar variation, in the proper ratio, of the rack carrier actuating mechanism.

In conjunction with the power transmission mechanism, for connecting the actuating mechanism for the printing or other machine and the rack carrier actuating mecha nism, I provide an independent source oi power capable of imparting movement to the rack carrier actuating mechanism independently of the source of power operative upon the printing or other machine, so that upon the interruption of the power to said printi or other machine, a continuing travel may imparted to the oven racks by said independent source of power.

The construction and arran 'ement of '3 is such, that when power is being said printing or other machine, power transmission mechanism is opera r upon the rack carrier actuating mca the racks will he normally in step wit i e printing or other machine, irrespe e of the position of the racks, upon powei." yeing initially applied to the rack carrier through the transmission mocha .isn"; when starting said machine or ii iechanisn'i, any doviation from a proper normal relative pu tion of said machine a said re will be compensated for whatever the ex of this deviation may be. Furthermore, the embodiment of the invention herein shown and described, the construction arrangement of parts is such that the autontatic adjustment will be a .coinplished at some point of a single cycle o operatic the printing or other machine, so that n of adjustment from any cause wh be immediately corrected du ng a ole of operations of said machine.

The independent source of power ma i so connected with the oven rack actuet mechanism as to be automat discozr nected therefrom upon the appiia power to said mechanism thr -h. mission mechanism, althou; I fully appear hereinafter, this is in preferable, and not an essential. ClI 1l'iQYTi l: tic of the structure of my invention.

The invention consists primarily in a ing oven unit embodying therein the combination with a printing or other on chine, an oven carrier having sequence of raclis, ac.- tuating mechanisms operative respectively upon said machine and said carrier, and source of power common to both of tuating mechanisms, of power t i means between said mechanism lyiiiq therein an automatically acting: c i m anism permitting the operation of suit. car rier actuating mechanism indeuenheutlv r said transmitting mechanism, and mean whereby said clutch is operative to transmit power only when said machine and said carrier are in normally operative relative positions, and means for applying power to said carrier actuating mechanism independently of said main source of power; and in such other novel features of construction and combination of parts, as are hereinafter set forth and described, and more particularly pointed out in the claims hereto appended.

Referring to the drawings,

Fig. 1 is a side elevation of a unit embodying the invention, only a fragmentary part of the machine feeding mechanism and of the oven proper being shown;

Fig. 2 is side view of the clutch mechanism shown partly in section and partly broken away;

Fig. 3 is a top view of Fi Q; and

Fig. 4 is a detailed view of the mechanism for ai iplyin power to the oven carrier actuating mechanism independ cntly of the printing or other machine actuating mechanism.

Like numerals refer to like parts throughout the several views.

In the embodiment of the invention shown in the drawings, it illustrated in connection with drying oven unit including an ordinary tin plate drying oven having ssociated therewith an ordinary planographic printing press for applying eecorative designs to tin plates. A fragmentary portion of the drying oven is shown at 10, the printing press is shown at 11, and the printing; couple o said press at 1Q13.

Drying; ovens of the type above referred to, are provided with a carrier consi tiny; of sprocket chains having a large number of racks thereon, id carrier ha; 11g travel iuiparted thereto at fairly low d through the oven by means of sprocket woeels about which the chains pass. A fragmentary p ti on of the carrier and sprocket mechanism i1 shown at 14---1F, an a number of racks 16 at the point where the chain it passes about the sprocket wheel 15 at one cud of the oven a e also shown. A further detailed de crip" n of the oven is unnecessary since the construction mode of operation of such ovens are u ls th the feedi of fordingr clearance y a s ieet in relation to each rack.

Tl t e? other machine 11 is proord' arv delivery tapes 17., th i e end of which is adiacent the path of movement of the outer ends of the various these raclts tov facilitatu d ed said sprocket wheel.

adyus 1. main power shaft rocks 16 so as to permit a tin plate upon said delivery tapes to be fed directly to a rack 16. This general construction and arrangement of parts old and well known in thev art, the practice prior to. my invention being to provide a source of power acting simultaneously upon mechanisro' 11 and the sprocket wheel and a n anually operable clutch by which said source could be disconnected from A separate source of power wasialso provided for the sprocket wheel which could housed whosaid clutch released. VVith this condition, as heretofore stated, it was necessary to manually t or regulate the relative position of the print couple l213 of the machine 11, and of he racks 16 after each stoppage of the ma chine 11, so that during a run of machine, the timing of the positioning of succeeding racks in relation to tie delivery tapes 1? would be in accord with the delivery sheets result of the operation of the This adjustment or regulation considerable time and the exercise considerable skill to ensure the proper pog of the various parts.

hown in the drawings, the machine 11 vcn by means of newer supplied from a motor 18, this power being applied to the 19 of the actuating mechanism for the machine and the gear train connecting power shaft with the printing dri 14 of the oven proper is proactuating mechanism by spro ber of racks 16 will bnoved from their operl n to the tapes lithe mecr nism include a speed reducing: mechanism wl ich,

in the iiirm of the invention shown, consists of vorm wheel 20 and worm shaft 21 and other redu means, so that the ratio of speed. of the sprocket wheels, as compared .w" h that of the printing couple of'tlie Inachi. is 11, is such that only one rack 16 will be brought known prior my invention. present invention includes a power sion mechanism by which, when said for said carriermust into the operative relation to said 1 5 L oelive y tapes 1!, and moved therefron'i, with each revolr ion of the printing couple 12+l3.

machine and said carrier are in normally operative relative positions, power from the same source, the motor 18, will be applied simultaneously to the actuating mechanism for the macl 'ne 11 and to the oven carrier actuating mechanism, which transmission mechanism includes therein, means permitting power from an independent source to be applied to the oven carrier actuating mechanism upon the interruption of the applica tion of power by the motor 18.

For thepurposes of the present specification, the actuating mechanism for the oven carriers will be considered as including the sprocket wheel 15, the worm wheel and shaft 20--2l or other speed reducing gearing, the driven shaft 22 of an automatically acting clutcii mechanism embodied in a sort of differential gearing, and gears 23 and 24- connectin g th shaft 22 with the shaft 21. The actuating m cha ism for the machine 11 will earing connecting same Driven from the actuating mechanism for o machine 11, in any'desired manner, as by e chain. and sprocket mechanism 25 and the 3s 26 and 27, is the driving shaft 28 of the ni sion mechanism, one end of which oft is suitably mounted adjacent said gears n "l 2?, and the other end of which is mou d in suitable bracket 29.

iried by and rota-table with the shaft 28 driving member of an automatically c ig clutch mechanism consisting of a me 30, having idly mounted therein a large gear 81. 111 mesh with said gear 31 l bevelled gear 32, carried by the naft 22 forming a part of the oven carrier actmti g mechanism, which shaft 22, adjacen bracket t a so in one end of the frame the gear 81 1s a clutch plate 34 is tooth 35 thereon. Mounted havine' a 2 upon the frame 30 is spring pressed dog or pawl 36, co-operatin with the clutch plate 34 and its tooth 35. This pawl'36 permits r tation of the gear ceases, and with a continued rotation of the shaft 22, said will own axis by the 32, thus disengaglng the tooth 35 from no pawl or dog 36 to an extent determined by the quantity of rotary movement of said gear 81; The effect of this be turned about its will be more fully described hereinafter.

dered as the main power shaft 19 and ar, is mounted in a suitable Consequently when the pawl is engaged Mic action heretofore described, af- 1. m -i ft} p, ].Oitro l-iltsxl llLblll l loutbioll 16 S J. b

V 7 1 I L 22 andtne op ,L'ZO tne oven carrier dCLllsting incchain, i. dependently of its actua- L1 said transnn 1mg mechanism, and the ch ch plate and pawl or do 3G co-operat I 1 1 t9 l mg with the tooth do or s i clutch plate affords means whereby the clutch is made operyl'o tiztnaunit power when said mad cair pawl 315 Th con,

are in normally opera- This also will be more I 1 bed hereinafter.

order to ensure a continued operation of echanism for the oven carrier, tide a s par-ate source of power, preferaol ccnsis g of a motor 37 connected by a s eed 1" mechani in with the driven .fl' sha t ref rably, this connection is by means 1 ordinary ball clutch mechanism 39 as shown in Fig. a, so that there will be automatic disconnection of the shaft 22 motor 3? when power is applied to ca said rt by the driving shaft 28, it being un- 'rod that the speed of drive of the driven 22 by the motor 37 when the clutch 39 is i lower than the speed of drive of the machines e commonly equipped with automatic feeders, and a fragmentary 1 of such a feeder is illustrated at e10 n order to secure uniformity in oughout the unit, 1 preferably to the feeding mechanism 19, tl rough the gear 26 by having gears enmeshed 6 and a gear conshaft of the feedevcr, is a mere A.) be

the herein described unit ally as follows the operation of an oven unit .nvcntion, certain arbitrary be selected.

ned that the prin'tin couple oeed of R. P. hi; that the 13 has 2-!- teeth', that the ratio 7 'ochet mechanism is ing shaft 28 of the ison with the speed of or the printing couple, rat the speed ratio of the s one to two. and that the and gear 20 is as one to l i'llt concitions above described, the i sorocliet wheel 15 will be turned onetwcntyfourth of a revolution with each revolution of the members 1213 of the printing couple, or have two R. P. M., so that during each minute, fortyeight racks will be brought into, and moved out of, the operative relation to the delivery tapes 1?. Hence, when the pawl 36 is engaged with the tooth 35 so as to cause a normal operation of the unit, the carrier racks will be absolutely in step with the printing couple at all times and at every point of the cycle of operations of said couple.

Upon the interruption of power to the motor 18, however, it is necessary to apply power to the carrier actuating mechanism from the motor 37, and as amatter of convenience, the

power of this motor is applied through the clutch mechanism 39 to the shaft 22, for which reason this shaft is herein considered as a part of the actuating mechanism for the oven carrier.

When the motor 37 is operating, it is ob vious that the movement of the racks is out of step with the printing couple, which is at rest, since, while power is bein applied to the driven shaft 22, the gear 32 is being rotated and will impart movement to the gear 31 in the direction shown by the arrow, Fig. 2, thus releasing the clutch because of movement of the tooth 35 of the clutch plate 3 1 away from the dog or pawl 36, the frame 30 being stationary.

The ratio of the gears 31 and 32 is as four to one, which is the same ratio as that existing between the speed of the printing couple and the shaft 28. Consequently, the tooth can be disengaged from the pawl or dog only during a period corresponding with substantially one full rotation or cycle of operations of the printing couple, and during this time, only a single rack may be moved into and out of the proper relation to the tapes 1?.

In assembling the transmitting mechanism, the printing couple 12-13 and the oven carrier 14 are so set that with a normal operation of the unit by the main actuating mechanism, the tapes 17 will deliver a printed or otherwise decorated or coated sheet to a rack 16, and rack 16 will be so positioned as to properly receive this sheet upon the completion of each cycle of operations. hen the parts are in this position, the automatically acting clutch mechanism or differential gearing is incorporated in the transmission mechanism with the gear 31 meshed with the gear 32 and the tooth 35 engaged with the pawl or dog 36. lVith the parts in this position, upon the application of power to the motor 18, the printing or other machine 11 and the carrier 1% will be simultaneously actuated, and by reason of the establishment of the proper speed ratio between the printing couple 12-13 and the carrier 14, the racks 16 will be successively brought into the operative relation to the delivery tapes 17, the timing of their positioning being synchroestablished,

nized with the operation of the printing machine 11, and this synchronization will not be disturbed by any variation in the speed of operation of the printing machine her during any part of a full cycle of operations.

Upon the assembly of a drying oven unit as above described, proper relation of parts is but the dilficuty is not-to establish this relation of parts, but to reestablish it when synchronization in the operation of the two mechanisms is as a r sult of the actuation, stoppage or reversal of the mac line 11, either during the malreready of the printing or other mach' .W 11, or when servicing or repairs are required during a run of the machine.

After a drying oven unit has once been put into service, as heretofore stated, it is essential to continue the operation of the carrier 14 after the stoppage of the machine 11, so that during the makeready of any press, when resuming a run or starting a fresh run,the carrier 14 may be so positioned, if power were applied to the carrier actuating mechanism simultaneously with the application of power to the actuating mechanism for the printing or other machine 11, the various racks would be actuated out oi step with the printing couple 12-13 and there would be constant collision between the delivered sheets and the racks.

During the makeready of the press, this condition ordinarily exists, and prior to my invention, morning and in the afternoon, it was necessary tomanually adjust the mechanism 11 and the carriers 14 so as to establish a proper relation of these parts to permit the be inning of a run. The same conditions were present following any stoppage of the printing or other machine 11. The mechanism herein described is to automatically correct this condition.

The operation of the mechanisms herein described can propably best be understood by considering a condition requiring the stoppage of the machine 11, durin a run of the unit. Under such conditions, power to the motor 18 is interrupted, and power is applied to the motor 37, since, as a matter of economy, it is desirable to utilize the motor 37 only when power to the motor 18 is inter rupted, since when power is being derived from the motor 18, no power will be applied to the shaft 22 by the motor 37.

When the motor 18 is stopped and the motor 37 is operated, the actuating mechanism for the carrier 14 will impart continuing travel to said carrier and to the racks 16 carried thereby. As a co ..sequence, the racks 16 will be successively brought into and out of the proper relation to the delivery tapes 17, but no sheets will. he delivered thereto. Sheets previouslydelivered to the oven racks however, will continue their travel through is such that when the when starting up a unit inthe the oven, and unnecessary prolongation of the subjection of such sheets to the action of shalt requires four l 3-."0l11l310115 to impart onetwenty-fourth 01 a revolution to the sprocket wheel 15. In other words, four revolutions of said frame is necessary to move one reel: 16 out the proper relation to the tapes 1? and to bring a succeeding rack into such relation.

it will also be borne in mind that the ratio between the gears 31 and '32 is as four to one, and furthermore, that the setting of the parts pawl or dog 36 engages the tooth 35, a rack 16 is in the proper positionrelative to, or in step with, the machine 11, and with the continued operation of the unit, a sheet may be delivered thereto from the tapes 17.

Immediately following the stoppage of the frame 30 and the application of the power of the motor 3'? to the shaft 22, irresaective of speed, one of the various racks 16, will begin to pass from this relation or move out of step with the machine 11. At the same time, the gear 32 will impart rotation to the gear 31 to move the tooth 35 out of engaging relation with, and away from, the pawl. or dog 86, which movement will be indirect proportion to the quantity of movement of a rack 16 from its proper posi- "tion in relation to the machine 11. Since it takes four revolutions of the shatt 22 to move one rack 16 l'rom its sheet receivlng pos1- tion and bring the succeeding rack 16 into this position, and since the ratio of the gear 32 to the gear 31 is as one to four, it is oh vious that with four revolutions of the shaft 22, the 1 will receive one complete revolution, the pawl or dog 36 will again be engaged with the tooth 35, and that this will occur simultaneously with a succeeding rack 16 coming into its proper and normal relation to the machine 11. Consequently, since the shaft 22, during the normal operation of the unit, has four revolutions to one revolution cycle of the printing couple 1213, the operation of the synchronizingv attachment of the transmission mechanism, is such as to corr ct only such error or loss of adjustment in the setting. of the carrier mechanism in relation to the printing couple as may occur during one cycle of operations of the printing couple, and error cannot accumulate beyond this. v

T 1e carrier 14 may be actuated for any deired length of time after the stoppage of ne machine 11, and the conditions will be merely a repetition of the action of the racks 16 out of, and back into, step with the printing couple during a time interval represented only by that required for one revolution of the members of said couple.

Then the conditions an such that the machine 11 may be re-started, it is merel necessary to apply power to the motor 18 irrespective of the relative position of the mem bers 1213 of the printing couple, or of raclzs 16 in relation thereto.

For purposes of explanation, it will be assumed that when the machine was stopped, the members 12*13 of the printing couple were in that position selected as the basis of the setting of the various mechanisms during their assembly, or had been brought to that position prior to such application power, that the shaft 22 had just completed three revolutions following the disengage ment of the tooth 35 with the pawl or dog oh, that the power to the motor 37 had been interrupted and the shaft was at rest. Hence, at this moment, the shaft 22 has had three of the possible four revolutions necessary for moving one rack out of its proper position in relation to the machine 11 and a succeeding rack into that position, the gear 31 has received three-quarters of a full revolution, or three-quarters of its possible movement between the disengagement of the tooth S and pawl or dog 36 and the re-engagement of these parts, and a rack 16 has been advanced three-quarters of its full movement.

With the application of power to the printing couple of the machine 11, the shaft 28 will be rotated, the frame 30 and the gear 31 turning therewith. Since the gear 32 is idl the planetary movement of the gear 31 about same will result in its being rotated about its own axis and in a direction opposite to that at which it is rotated by the gear 32 when the shaft 22 is being turned by the motor 37. During this action there will be no clutch action of the gears 31 ant 32 to transmit power to the shaft 22.

Upon the completion of each planetary cycle of the gear 31, it will have received a reverse rotary movement of one-quarter of its full revolution, so that it will require three revolutions of the frame 30 before the tooth 35 is again engaged with the pawl or dog 36. Instantly, with the engagement of said tooth and pawl or dog, rotary movement of the gear 31 about its own axis will cease, power will be applied therethrough to the gear 32 as a result of the clutch action thus developed, and the shaft 22 will be rotated the same speed as the shaft 28. This will occur when the members 12-13 of the prin ing couple have reached the three-quarter point of their cycle of operations, and will bring the machine 11 into step with the carrier 14, so that during the remaining onequarter of the cycle, the actuating mechanism for the carrier 1 L will be operated to impart the remaining onequarter of the full movement required to bring a rack into the pro-per sheet receiving relation to the tapes 17. In other words, the automatically acting clutch so functions that if any rack 16 has been advanced beyond the point where it is properly set in relation to the position" of the printing couple, the actuation of the carrier actuating mechanism will be delayed to the same extent as the rack has been advanced, and will become operative immediately that the relative position of the members 1213 of the printing couple and of a rack 16 coincides with the normal operating condition for which the unit was initially set, and the extent of the delay will be immediately proportioned to the extent of the advance of the racks, irrespective of the amount of this advance.

If a rack be advanced, or out of step with the machine, only one-(punter of its full movement, the gear 31 will have been actuated to move the tooth 35 only 90 from the pawl or dog 36 and only one revolution of the frame 30 will be required to r establish the proper setting of the eel: in relation to the printing couple.

The rectification of the conditions in the unit will be secured in exactly the same way, irrespective of how much or how little the rack movement is out of step with the machine 11 as determined by the extent of advance of the racks, it being always understood that when the tooth 3:) is engaged with the pawl or dog 36, the racks are in step wi h the printing couple whatever the position in a cycle of operations may be.

it is necessary, to a clear understanding of the operation of the herein close I d unit to realize that the degree to which the racks may be out of step is determined by the position occupied by the printing couple 1i2-13 at the time when a run oi the unit begins and is not dependent upon any particular position of said printing couple.

The sheet receivin position of the racks in relation to the deli y tapes is no factor whatever, since a racit nray be in this position and be entirely out of step with the printin couple. The racks, under normal conditions, are in step with the priutii'ig couple throughout the entire cycle of the couple, and lose step therewith only pen the ITQQPJ'Q of the printing couple and irrespective of the point of such stoppage. If the printing couple has completed one-half of its cycle when it is stopped, a rack will have been advanced onehalf of its full movement beyond the tapes 17. If the independent application of power, following this stoppage, is inlcrrupted when the gear 31 has received two of its four pos sible revolutions, the racks will be out of step with the printing couple in an amount equalling one-half of the full movement of the racks with each cycle of said couple. Hence, at this instant. a rack will be in sheet receiving relation to the ple at any time, the rotation 7 machine with the racks in step wit J eXist even though power be appliec to tapes I? and the shaft 22 will be at rest.

It takes one-half a revolution to complete the cycle of the printing couple. During this one-half revolution, the frame 30 will receive two complete revolutions. With these two completerevolutions, the gear 31 will receive one-half a reverse revolution be fore the tooth 35 engages the pawl or dog 36. (,lonsequently, at this moment, the machine 11 and the racks 16 are brought into step with each other.

Since the degree to which the racks are out of step with the printing couple is determined by the extent of movement of the tooth 35 away from the pawl or dog 36, and since the position of the frame 30 is determi ed by the position of the members of the printing couof the gear 31 in the manner above described, to cause movement of the tooth 35 toward the pawl or dog 36 to the same extent that said tooth was moved away from said dog by the gear 32, will establish the same condition of parts as when the printing couple was stopped.

The racks being out of step with the o ing couple results from movement of the toot-n 35 away from the pawl or doc; a result inc reof the rotation of the shaft 22. establishment of the normal set mg couple results from the re tooth into engagement with sci 36.

While I have referred to the printing couple when the macl n stopped, it is obi 'ious that the some con the members of the printing couple i direction while the carrier is being actuated by the motor 37,, since this actuasimerely change the position of he of the printing couple and i o i relation of the gears 31 and 32 to each other, and the degree to which the racks are'out of step.

While it never requires more than one revolution of the printing couple l213 to establish a. proper relation of the racks there with, it is obvious that ordinarily this couple is rotated a number of times followi each stoppage of the machine before sheets are fed thereto. This condition permits a departure from the exact construction herein described, wherein the arrangement is such that only one revolution of. the printing couple is necessary to accomplish the pur poses of the invention.

When the clutch mechanism 39 is used, its effect is merely to disconnect the shaft from the motor 37 substantiall simultaneously with the application of power to shaft through the clutch mechanism transmitting power thereto from the shaft 28,

While I have described the invention drying oven, it is obvious cl the combination with a racks, an 111g machlne, and a source of power operative connection with a printing machine and a lot it may be utilized in connection with other 1'l1""le')9 units in which it is necessary to n maintain the different mechanisms or unit in step, one with the other, and in which one of these mechanisms is subject to operation independently of the other.

It is therefore not my intention to limit trio invention to the precise details of construction herein shown may be varied without departing from the spirit and scope of the invention.

Having described the invention, what l claim as new and desire to have irotected by Letters Patent, is i l. A drying oven unit embodying therein the combination with a printing or other ma chine, an oven carrier having a sequence of racks, actuating mechanisms operative respectively upon said machine and said carrier, and a source of power common to both. of said actuating mechanisms, of power transmitting means between said 'mechanisms, embodying therein an automatically actin clutch mechanism permitting the operation of said carrier actuating mechanism independently of said transmitting mechanism, and means whereby said clutch is operative to transmit power only when said machine and said carrier are in normally operative relative positions, and means for applying power to said carrier actuating mechanism independently of said main source of power.

2. A drying oven unit embodying therein printing or other machine, an oven carrier having a sequence of actuating mechanism for said printupon said actuating mechanism, of a car ier and described, since such actuating mechanism containing speed reducing means, whereby said racks are successively advanced by said carrier in timed relation to succeeding cycles of said machine, when said normal operative relation, power. transmitting means between said machine one said carrier actuating mechanism, embody therein an automatically actin clutch lllecli anism containing a driving member. connec tions between same and said machine actuating mechanism, fl'Cll'lVGD. member operatire upon said carrier ac" rating mechanism, and means whereby said clutch is operative to transmit power only when said machine and said carrier are in normal operative relative positions, and means for applying power to said carrier actuating mechanism independently of said transmission mechanism.

3, A drying oven unit embodying therein the combination with a printing or other machine, an oven carrier having a sequence of racks, an actuating mechanism for said printing or other machine, and a source of power operative upon said actuating mechanism, of

machine and said carrier are in a driving shaft, connections between said driving shaft and said machine actuating mechanism rotating said shaft at a higher speed than said machine, differential gearing actuated b said driving shaft, a carrier actuating mechanism including a driven shaft, a gear thereon forming apart of said differential gearing, and connections between said driven shaft and said carrier, an independent source of power operative upon said carrier actuating mechanism, and means operative upon said differential gearing to cause the transmission of power therethrough only when said machine and said carrier are in normal operative relative positions, and permit the application of power to said carrier actuating mechanism from said independent source.

at. A drying oven unit embodying therein the combination with a printing or other machine, an oven carrier having a sequence of racks, an actuating mechanism for said printing or other machine, and a source of power operative upon said actuating mechanism, of a driving shaft, connections between said driving shaft and said machine actuating mechanism rotating said shaft at a highe speed than said machine, a frame carried b and rotatable with said driving shaft, planet gear mounted. in said frame, a c rrier actuating mechanism inclu ling a driven shaft mounted in said frame, a gear thereon enmeshed with said planetgear, and connections between said driven shatt and said carrier, an independent source of power operative upon said carrier actuating mechanism, and means operative upon said planet gear preventing its rotation and causing the trans; mission of power therethrongh from said driving to said driven shaft when said machine and said carrier are in normal operative *elativc positions, and permitting its rotation when said driving shaft is inoperative to transmit power, and power is applied to said carrier actuating mechanism from said independent source.

A drying oven unit embodying therein the combination with a printing or other machine, an oven carrier having a sequence of racks, an actuating mechanism for said printing or other machine, and a source oi power operative upon said actuating mechanism. of a driving shaft, coz

iections between said driving shaft and said machine actuating mechanism. rotating'said shaft at a higher speed than said machine, a frame carried by and rotatable with said driving shaft, a planet gear mounted in said frame, a carrier actuating mechanism including a driven shaft mounted in said frame, a gear thereon enmeshed with said planet gear, and connections between said driven shaft and said carrier, an independent source of power operative upon said carrier actuating mechanism, a clutch dish having a single tooth carried by and rotatable with said planet gear, and a pawl carrier by said frame and co-o crating with said tooth, said tooth and said pawl being so positioned tl it when they are engaged. to prevent rotation of said gear and cause the transmission of power therethrough from said driving to said driven shaft, said machine and said carrier will be in normal operative relative positions, and said gear may be moved to disengage said to th from said pawl when said driving shaft is inoperative to transmit power, and power it L n-plied to said carrier actuating mechanisn from said independent source.

6. iii drying oven unit eu'iliiodying therein the cor'ihination with a printzng or other machine, an oven carrier having a sequence of racks, an actuating mechanism for said printing or other machine, and a source of power cperatne upon said actuating mechanism, of a driving shaft, connections between said "iving shaft and said machine actuating nism rotating said shaft at a higher it than said machine, dilicrential gear by said driving shaft, a car 'ier anism including a driven thereon forming a partof said 5 geari g, and speed reducing whercbv said racks are successively W said carrier in timed relation to t succeed ng cycles of said machine, when said id carrier are in normal operi an independent source of power operative upon said carrier actuating mechanism, and means operative upon said a i'ereutial gearing to cause the transmission of power thcrethrough oniy when said machine and said carrier are in normal operative relative positions, and permit the application of power to said carrier actuating mecln sin from said independent source.

7. A. drying oven unit embodying therein the combination with a printing or other ma-- chine, an oven carrier having a sequence of racks, an actuating mechanism for said brinting or other machine, and a source of power operative upon said actuating mechanism, of

a riving shaft, connections between said driving shaft and said machine actuating Il'lGClltI'fliSln rotating said shaft at a higher speed than said machine, a frame carried by and rotatabie with. said driving shaft, a planet gear mounted in said frame, a carrier actuating mechanism including a driven shaft mounted in said frame, a gear thereon eiuneshed with said planet gear, and speed reducing means between said driven shaft and said carrier, whereby said racks are successively advanced by said carrier in timed relation to succeeding cycles of said machine, when said machine and said carrier are in normal operative relation, an independent source of power operative upon said carrier actuating mechanism, and means operative upon said planet gear preventing its rotation and causing the transmission of power therethrough from said driving to said driven shaft when said machine and said carrier are in normal operative relative positions, and permitting its rotation when said driving shaft is inoperative to transmit power, and power applied to said carrier actuating mechanism from said independent source.

8. A drying oven unit embodying therein the combination with a printing or other machine, an oven carrier having a sequence of racks, an actuating mechanism for said printing or other machine, and a source of power operative upon said actuating mechanism, of a driving shaft, connections between said driving shaft and said machine actuating mechanism rotating said shaft at a higher speed than said machine, a frame carried by and rotatable with said driving shaft, a'plan et gear mounted in said frame, a carrier actuating mechanism including a driven shaft mounted in said frame, a gear thereon enmeshed with said planet gear, and speed reducing means between said drlven shaft and said carrier, whereby said racks are successively advanced by said carrier in timed relation to succeeding cycles of said machine, when said machine and said carrier are in normal. operative relation, an independent source of power operative upon saidcarrier actuating mechanism, a clutch disk having a single tooth carried by and rotatable with said planet gear, and a pawl carried by said frame and co-operating with said tooth, said tooth and said pawl being so positioned that when they are engaged to prevent rotation of said gear and cause the transmission of power therethrough from said driving to said driven shaft, said machine and said carrier will be in normaloperative relative positions, and said gear may be moved to disengage said tooth from said pawl when said driving shaft is inoperative to transmit power, and power is applied to said carrier actuatingmechanism from said independent source.

9. A drying oven unit embodying therein the combination with a printing or other machine, an oven carrier having a sequence of racks, an actuating mechanism for said printing or other machine, and a source of power operative upon said actuating mechanism, of a driving shaft, connections between said driving shaft and said machine actuating mechanism rotating said shaft at ahigher speed than said machine, a frame carried by and rotatable with said driving shaft, a planet gear mounted in said frame, a carrier actuating mechanism including a driven shaft mounted in said frame, a gear thereon enmeshed with said planet gear, the diameters of said planet gear and said gear enmeshed therewith being in inverse ratio to the speed relation between sald machlne and said drlvmg shaft, and connectlons between $316.

driven shaft and said carrier, an independent source of power operative upon said carrier actuating mechanism, and means operative upon said planet gear preventing its rotation and causing the transmission of power therethrough from said driving to said driven shaft when said machine and said carrier are in normal operative relative positions, and permitting its rotation when said driving shaft is inoperative to transmit power, and power is applied to said carrier actuating mechanism from said independent source. 7

10. A drying oven unit embodying therein the combination with a printing or other machine, an oven carrier having a sequence of racks, an actuating mechanism for said printing or other machine, and a source of power operative upon said actuating mechanism, of a driving shaft, connections between said driving shaft and said machine actuating mechanism rotating said shaft at a higher speed than said machine, a frame carried by androtatable with said driving shaft, a planet gear mounted in said frame, a carrier actuating mechanism including a driven shaft mounted in said frame, a gear thereon enmeshed with said planet gear, the diameters of said planet gear and said gear enmeshed therewith being in inverse ratio to the speed relation between said machine and said driving shaft, and speed reducing means between said driven shaft and said carrier, whereby said racks are successively advanced by said carrier in timed relation to succeeding cycles of said machine, carrier are in normal operative relation, an independent source of power operative upon carrier actuating mechanism, and means operative upon said planet gear preventing its rotation and causing the transmission of power therethrough from said driving to said driven shaft when said machine and said carrier are in normal operative relative positions, and permitting its rotation when said driving shaft is inoperative to transmit power, and power is applied to saidcarrier actuating mechanism from said independent source.

In'witness whereof I have hereunto aflixed my signature, this 3rd day of December, 1928.

JOHN D. ELDER.

when saidmachine and said 

